Adjustable gun sight



BIB-258m CM? 2916229090 5R June 13, 1939- D. w. KING 2,162,090

`ADJUSTABIFE. GUN SIGHT Filed April 2o, 1958 L? Y; i ta .Y\\\ .M 17 s M 2 2 INI/ENFORT DEA/v w. K/NG.

Patented June 13, 1939 UNITED STATES hearth toorn PATENT GFFICE 4 Claims.

My invention relates to adjustable gun sights, and more particularly to a gun sight wherein elevation and windage adjustments may be obtained with a single sighting element.

Among the objects of my invention are: To provide a simple and efiicient gun sight having windage and elevation adjustments; to provide such a gun sight having audible measuring adjustments combined therewith; to provide a simple two piece adjustable gun sight; to provide a single sight element separately adjustable for windage and elevation; and to provide a simple and eiiicient rear sight for firearms,

My invention possesses numerous other objects and features of advantage, some of which, together with the foregoing, will be set forth in the following `description of specic apparatus embodying and utilizing my novel method. It is therefore to be understood that my method is applicable to other apparatus, and that I do not limit myself, in any way, to the apparatus of the present application, as I may adopt various other apparatus embodiments, utilizing the method, within the scope of the appended claims.

While it is obvious that the sight as herein described and claimed may be utilized in conjunction with any type of iirearm, I have chosen as a specic example to describe my invention as related to a rear sight, as used on an automatic pistol.

My invention may be more fully understood by direct reference to the drawing, wherein Fig. 1 is a diagrammatic View, showing how the sight of my invention may be applied to an automatic pistol.

Fig. 2 is a top view of the sight alone.

Fig. 3 is a front view of the sight.

Fig. 4 is a side View of the sight.

Fig. 5 is a bottom view of the sight.

Fig. 6 is a sectional view, taken as indicated by the line 6 6 in Fig. 4.

Fig. l is a cross sectional view, taken as indicated by the line I--'I in Fig. 2.

Essentially, my invention comprises a sight composed only of two main units, together with the adjusting mechanism.

A foundation block I is provided with the usual chamfered edges 2, cut to fit in the usual sight slot cut across the axis of the frame or barrel of a firearm 3, such as an automatic pistol, shown in Fig.l l.

The foundation block I is provided with a cross channel 5 having parallel sides, and this cross channel is preferably at a slight angle to the perpendicular of the block and inclined to the rear of the sight. vThe bottom of the cross channel 5 is provided with forward and rear retaining channels 6.

Mounted to slide laterally and vertically in cross channel 5 is a sight block 8 having an 4upper surface parallel to the upper surface of foundation block I, this surface being centrally provided with a sightingv slot 9. This sighting slot, at the rear of the sight, is preferably parallel-sided, but the forward sides of the slot are preferably cut to diverge, thereby forming a widened front portion I0. It is obvious, however, that while I have shown the sight slot 8 at the rear of the sight block as of rectangular section, it may be of Vsection, or of any other section preferred by shooting enthusiasts, in order to obtain a proper rear sight outline.

The bottom surface of sight block 8 is provided with a projection II extending downwardly into a cavity I2 in the foundation block I. This projection on one side thereof is sharpened to pro vide a click edge I4 bearing against the end of a windage screw I 5, said end being provided with diametrical slots I6 engaging edge I4. Edge I4 is forced into slots I6 by windage spring I'I, held in windage spring cavity I8 in foundation block I.

I prefer to ofset edge I4, windage screw I5, and spring I I, as shown in Fig. 7, from the center plane of the sight block 8, in order to allow for the positioning of the elevation mechanism I am about to describe.

It will be noted that so far, I have provided only a windage adjustment, and that with the structure described there is nothing which would hold sight block 8 in cross channel 5. I hold sight block 8 within cross channel 5 by providing a pair of elevation screws 20, one on each side of the sight slot 9, these elevation screws 20 having heads 2l fitting retaining channels 6, wider than cross channel 5.

The lower surfaces of elevation screw heads 2| are provided with elevation notches 22, and a pair of elevation springs 23-23 are positioned one beneath each elevation screw head to one side of the axis of these heads, these springs 23-23 forcing click balls 24 against heads 2l, thus giving audible measurement of adjustment by the click balls dropping into click slots 22 as screws 20 are turned.

Once the sight block 8 is adjusted in the desired position, it is locked in place by tightening thereagainst set screws 25, passing through foundation block I and forcing sight block 8 against the rear of cross channel 5.

In its preferred form, the foundation block immediately back of sight block 8 is cut away t`o form a rear cut away portion 26, and the front of sight block 8 is cut away to for-m a sighting channel 21, thus allowing clear Vision through sight slot 9 at all adjustments.

In operation, the adjustment of the device is simple, and may all be accomplished by the use of a small screw driver. In case it is desired to change the adjustment of the sight, set screws 25 are loosened. Windage may then be adjusted without changing elevation by turning windage screw I5, the edge 4 clicking in and out of edge Slot I6 during rotation to audibly indicate to the adjuster of the sight the amount of Windage, as determined by the number of screw threads on the screw, which may of course be easily calcu lated to give any definite windage adjustment for specific firearms.

It is to be noted that when a windage adjustment is being made, heads 2| of the elevation screws 2U move over click balls 24. However, this does not disturb elevation adjustment, as that is controlled solely by the turning of screws 20. However, I make screw heads 2| of sufficient diameter so that during the entire windage adjustment the click balls 24 always bear against the screw heads 2|. As the clicks are only relative to a specific movement, the same number of clicks on each screw will raise the sight the same amount on each side of the sight line.

It should also be noted that when elevation adjustments are made edge I4 slides in diametrical slots I6 in the end of the windage screw, and therefore the windage adjustment is not changed.

Therefore, in case elevation is also desired, elevation screws may each be turned the same number of clicks, balls 24, under the urge of springs 23g-23, providing the sound as the balls fall into click slots 22. l As ywith the windage screws, the proper number of screw threads on the elevation screws may be calculated to give a definite elevation for a specific rearm for each click. After either windage or elevation has been adjusted, or both, set screws 25 may be retightened, and the sight is ready for use again.

The simplicity of the sight herein described and claimed is such that it is very dii'cult to make mistakes in adjustment, and the number of parts have been reduced to a minimum.

I claim:

1. A gun sight comprising a foundation member adapted to be attached to a rearm, a cross slot therein, a sight member carrying sight slriwdblepgtnnrticauy and horizontauy in F1a slot, a screw extedngrizontall'ykin said foundation member and bearing against said sight member, resilient means forcing said sight member against the end of said screw, said sight member being vertically movable over the end of said screw, and elevation means for moving said sight member vertically with respect to said foundation member and said screw.

2. Apparatus in accordance with claim 1, wherein the portion of said sight member contacting said screw is a vertical edge, and the end of said screw is provided with diametrical slots fitting said edge.

3. A gun sight comprising a foundation member adapted to be attached to a rearm, a cross slot therein, a sight member carrying a sight slidable both vertically and horizontally in said slot, a screw extending horizontally in said foundation member and having an end bearing against a vertical edge of said sight member, said screw end being provided with diametrical slots fitting said edge, resilient means forcing said edge against the end of said screw, a pair of elevation screws in said sight member and having heads thereon wider than the width of said slot, said slot being provided at the bottom thereof with side channels tting the periphery of said heads, and elevational resilient means tending to force said sight member vertically out of said channel against the restraint of said heads, said elevational resilient means being offset from the axes of said elevation screws.

4. Apparatus in accordance with claim 3, wherein the bottom surfaceA of said heads is provided with radial slots, and wherein the elevational resilient means terminates in a click member transmitting the resilient force of said latter elevational means to the heads of said elevational screws.

DEAN W. KING. 

